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(No ModeL) J. J. SOHILLINGER. APPARATUS FOR HEATING sPHALTUM, &c. No.322,325.

Patented July 14, 1-885.

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ATTORNEYS N. PETERS. PhotwUI-horaphr, Wahinm D. C.

UNITE STATES PATENT OFFICE.

JOHN J. SOHILLINGER, OF NEW YORK, N. Y.

APPARATUS FOR HEATING ASPHALTUM, 80C.

SPECIFICATION forming part of Letters Patent No. 322,325, dated July14,1885.

Application filed J nly 17, 1884.

To aZZ whom it may concern.-

Be it known that I, JOHN J. SCHILLING ER, a citizen of the UnitedStates, residing at New York, in the county and State of New York, haveinvented new and useful Improvements in Apparatus for Heating Asphaltumand other Materials, of which the following is a specification.

This invention relates to apparatus for treating asphaltum or otherliquid or semi-liquid material; and it has for its object to improve theconstruction of the bottom of the vessel which contains the material,and is subjected to the direct action of heat from a furnace in whichsaid vessel is suspended. In this class of apparatus it isimportaut toprovide the liquid-containing vessel .-with a bottom which can besubjected to the direct action of the fire in the furnace without daugerof the bottom rapidly burning out, or the formation of hard scales onsuch bottom. It is also important that the refractory bottom be sosupported and connected with the vessel as to provide a perfectly-tightjoint, in order to prevent the fire from igniting the asphaltum, whichwould likely cause an explosion. I accomplish these purposes in themanner and by the means hereinafter described and claimed, referencebeing made to the accompanying drawings, illustrating my invention, inwhich- Figure 1 represents a vertical central section of my apparatus.Fig. 2 is a plan or top view. Fig. 3 is an inverted plan of theheating-vesseldetached.

Similar letters indicate corresponding parts.

In the drawings, the letterA designates the heating-vessel, which iscomposed of a metallic jacket, a, open at both ends, and of a bottom,1), made of fire-clay or equivalent refractory material. The bottom issupported upon angle-irons c, which are riveted or otherwise firmlysecured to the bottom edge of the jacket. In the example represented inthe drawings four such angle-irons are shown;

.but the number may be increased, or a continuous inwardly-projectingflange may be formed on the lower edge of the jacket, to form thesupport of the bottom b. After the bottom has been adjusted upon itssupports the space between its circumference and the inner (No model.)

surface of the jacket is filled up with fire-clay, to provide a sealedjoint between the periphcry of the bottom and the inner surface of thevessel, thereby preventing leakage of the liquid asphaltum, and thepossibility of an explosion occurring by the flame from the fireigniting the asphaltum.

With the refractory bottom I) is combined a secondary bottom, (1,consisting of a disk of sheet metal, whichis placed loosely into thejacket a.

To the jacket, at or near its top edge, are firmly secured a series ofangle-irons, e, which support the heating-vessel in the furnace B. Thisfurnace is of a well-known construction, and it will be readily seen, byinspecting Fig. 1, that the fire-grate f is so situated that the bottomof the heating-vessel is exposed to. the direct action of the fire.

In heating certain materials-such, for instance, as asphaltum-a veryhigh heat is required, and for that reason it is desirable that thebottom of the heating-vessel shall be exposed to the direct action ofthe fire.

Where the bottom of the vessel is of metal exposed to the direct actionof the fire, a hard scale forms on such bottom audit soon burns out,whereas by my invention this is avoided while the bottom is exposed tothe direct action of the fire on the grate.

I am aware that the sheet-metal bottom of a culinary boiler has beenformed of two separated thicknesses, between which is a filling ofpowdered chalk, magnesia, or plaster-ofparis. I am also aware that inculinary boilers a soapstone slab has been removably held in the bottomopening of the vessel for intercepting the heat from the stove on whichthe vessel is used. Such, therefore, I do not claim.

What I claim as new, and desire to secure by Letters Patent, is

1. A vessel for heating asphaltum and similar material, consisting of afurnace having a grate in its lower portion, a metallic jacket suspendedabove the grate, a bottom of a fireclay disk arranged within the jacket,and a luting of fire-clay interposed between the cirpurpose described.

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2. An apparatus for heating asphaltuni and In testimony whereof I havehereunto set my similar material, consisting of a furnace havhand andseal in the presence of two subscribing a grate in its lower portion, ajacket susing witnesses. pended in the furnace and having an in- 5wardly-projecting flange at its lower edge, a JOHN J. SCHILLINGER. [.L.s.]

bottom of a fire-clay disk supported upon said flange, and a luting offire-clay interposed be- XVitnesses: tween the circuinierence of thebottom and the \V. HAUFF,

inner surface of the jacket, substantially as and for the purposedescribed.

E. F. KASTENIIUBER.

